number of levels
* Separation angle between the 2 Airy Beams: 9.2 Degrees
** High Efficiency
Ultrafast Airy beam optical parametric oscillator.
(a) Schematic illustration of the experimental setup for the ultrafast Airy beam OPO. λ/2: half-wave plate; PBS: polarizing beam-splitter cube; L1-2: Lenses; M1-3: mirrors; OC: output coupler; C: MgO:PPLN crystal (in oven); CPM: cubic phase mask; S: dichroic mirrors; PM: power meter. Recorded intensity profile of (b) resonant signal, (c) idler and (d) Airy beam, (e) 3-D illustration of the generated Airy beam.
Characteristics of Airy beam.
(a) Measurement of beam acceleration of the Airy beam OPO as a function of propagation distance. Solid line (black) represents theoretically predicted acceleration, (red) is the quadratic fit to the experimental data (dots). (Inset) Variation in the width (FWHM) of the central lobe of the Airy beam over propagation. Solid line (red) is linear fit to data (dots). (b–e) Verification of self-healing property of the output beam of the Airy beam OPO. (f) The line profile of the beam at a distance z = 10 cm (blue), z = 60 cm (red), z = 120 cm (brown) from the Fourier plane.
Performance of the ultrafast Airy beam source.
(a) Variation of the Airy beam signal power across the tuning range of the ultrafast OPO, while pumping with ~10.5 W of input power. (b) Variation of Airy beam (λAiry = 1632 nm) signal power with pump power. (c) Dependence of signal (λs = 1632 nm) and idler (λi = 3057 nm) power in Gaussian intensity distribution on pump power. (d) Interference autocorrelation trace of the Airy beam signal pulses. Inset: Corresponding spectrum.